CHANGELOG FOR USBSYNC

0.6: 
Automatically backs up any files that are deleted during synchronization.
Automatically prompts for deletion of old (configurable) backup directories.
Will automatically unmount the removable drive after synchronization (if possible).

0.5:
No more xmessages, so the program can be used from the console also. Does a
dry-run of the sync beforehand so that user can spot potential synchronization
problems beforehand and cancel the sync. 

0.4:
Code cleanup. Moved everything into functions to get rid of the ridiculous
amount of nested "if-then" statements.
 
0.3:
First really working version.